Make sure you convert the sounds that don't need to be in stereo (for instance, your bass sounds) to mono in the trim screen. A stereo sample eats up two voices, a mono one eats up one voice.You could also try resampling, for example if you layer two snares you could resample the final mixed sound to reduce your polyphony count.Or you could try assigning your loop chops on the same mute group so they don't overlap, that could possibly stretch your voice limit.These are the ways I have thought of.